The operation of a D.C. machine with large air gap lengths is comparatively_____________?
Correct answer: A. quiet
- A. quiet
- B. noisy
- C. either of the above
- D. none of the above
Explanation
A larger air gap reduces the magnetic pull between the stator and armature, which lowers vibration and magnetic noise. Thus, D.C. machines with large air gaps operate comparatively quietly.
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